Question

Blood is pumped around the body by a muscular __________. Blood travels away from the heart in _____________ these contract and ___________ the blood along. This can be felt as a ________ blood returns to the heart in the __________ these have ___________ walls than arteries. Blood is prevented from flowing backwards in them by _____________.​

Answer 1

Answer:

Blood is pumped around the body by a muscular organ called heart . Blood travels away from the heart in veins these contract and pull the blood along. This can be felt as a the impure blood returns to the heart in the veins these have thick walls than arteries. Blood is prevented from flowing backwards in them by valves

Answer 2

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